Quote from moo:
Great calls, again.
Why was 1392 such strong support?
How do you define (strong) support?
Now the title of this thread finally starts to work!
Sorry I missed your posts.
1392 was support because it was tough resistance on the way up. Also, if you look at the charts, 1292 was also tough going, and people think in round numbers (5,10,15,...100 and 1392 = 1292 + 100; 1342 is the SPX gap, and 1392 = 1342 + 50), with zero values often having lots of standing orders (in both directions, sometimes to buy the dip, or to take a stop loss, and you have to read which wins in realtime).
Strong support/resistance is where you expect price to bounce or reflect at least twice, and probably several times. This is gathered either theoretically from major points like 1420, or from price action and volume concentrations around that price in history. If you are a professional trader, you also remember the price action around a given level, and you note it either on your charts, or I just remember.
The more a S/R level is traversed, the less it matters next time. For example, while we will see some resistance at 1420, it is now only minor resistance.
nitro
PS Many people believe these support/resistance points work because they are self fulfilling and have no basis in science. Perhaps. But I believe they work because I believe that underlying models used by institutions aggregately have attractor points there, unbeknown to them.
http://en.wikipedia.org/wiki/Chaos_theory#Attractors